Water tubr connection



May 30, 1933. G, H, FUEHRER WATER TUBE CONNECTION Filed Sept. 24, 1931 I. ,fur Z INVENToR. HFuei/,zfea H15 A TToRNEY.

leos' e BY aF/F J Patented May 3l), 1933 GEORGE rr, remmen, onrriirrrrsnundu l fcorviriiiw, or JERSEY erri, new Jiiiisri, A consci-zarter; oriiuwsnnsuf i f i 'weren coitiiiieerori Application Vlez Scptemb rl`hisinveiition relates to rock drills, buty more particularly to a water tube connection for that type of rock drills in'which water g implementV is supplied to a hollow workin 5 for cleansingthe drillrhole. Y i

One object of the invention is'toi adequate seal between the cleansing fluid conveying elementi and the. percussive ele-Y ment ofthe rock drill. i

VAnother object is to facilitate the Voperation of removing and inserting the cleans-f yingelementsk from and into.

ing iiuid conve the rock drill..

Still another object is t struction andto facilitate the asse devices of this character.

Other objectsY will be inpart in part pointed o utvhereinafter.

Y YVln the drawing accompanying this ,speci-v rence char-l Vlication and in which similar refe acters refer to similar parts', Y Y Figure l 1s an eleva-tion partly insect sverse i view ;talren througlifFigure 2 on Athelline" 5-5 looking'.

in the direction indicated by the arrows. Referring more particularly to the drawing, the rock drill wherein the invent-ion is i embodied is designated in general by A. and comprises a cylinder B and a hammer piston in the cylinder and only the eXtreme forward end C of which is shown. The rock drill'A may be provided with suitable pres- 40 Asure iiuid distributing mechanism to effect the distribution of pressure fluid to the cylinder B for actuating the piston and such mechanism, of which only a valve chest D is indicated, may be conveniently arranged on the side of the cylinder B.

The cylinder B is provided with the usual back and front heads E and F, respectively, which may be secured to the cylinder by ymeans of the side bolts Gr only a portion ofV one of which is indicated.

assure' ank Y; transmitted to fthel drill' steel'r-fbyf-"anaiivilj o simplify Ythe mblyofvv obvious ,and

ion of airock `drill equipped withawater tube connection constructed in accordance with V levationV @tional elevations.

tenete e We. weer JW if u nw Jzsitsiijif, esteriore rc irieuitsofnn- 4; i921. -s'eriaiNestearzQ Asis customar1 the front head-vw fords a housing for chuck mechanism.' desigr-i natedin general'byH an'dlieingV adaptedvtcr- Y accommodate afworking implement;l such asalh'ollow drill steelllwhich extendszwitlriitsw= rear end into acavityKin thejchuckmecha-e nisin- H treceive the .blows *of thefhaniinery piston f, which in the present finstance'l are block L inthe chuck mechanism Therockfdrill Allisy `illustrated'asp be of the .type equipped: withfmeansgforcsupr;` plying. cleansing fluid *to the' hollow y drill:V steel `lJ i whereby it fisconveyed into' the .driflllff holeftoV wash 'or i flush the "duttingsitherefromc 65"' so thataicleanworliing face'mayibelateallatimes `presented to the .-cuttingxb'it tof-theta working implement. lThe drillA ,-is accordsingly'fprovided 4vizithia water tubeQgwhich' extends through an aperture Pfintheib'a'k T0 head andv through .the` cylinder` i and;V the" chuclimechauisnrI-l arid withiitsifron ndi" Qinto the drill steel l?" .13 i :In therear Aend ofy thebaclrhead s recessR thrcugh which' thelir'ear,v endjofiithe 75 tubeOeXtendsand inteA Whichpthe re of` ther-aperturePizopens.; @Thcgtube Oris prefi.; erably provided; with. anexternal"{iangeiorz enlargementiS to seat. upon :the bottom-: ofi the recess R and thus definitely:zlimittheiS0 distancelthatthe tube may extend i o the-drillsteel:-l Affclosureiis i the form [of `aprplug.1l`jfhaving accommdation o'fsa wrenchCort.similar? im plement employedL lfor threading the? plud into. the recess-1R. VPrefer'ablyfria Vgasket' f isiinterposed between thehead Uandvthe rear'end of the' back'head to sealfthenrear end of the recessR.- i` Y i z The portion ork extension: WV ofi .the plug T which lies" within the. recess'iRfmay beu; Vsomewhatreduced:in diameter and -is:'pro

vided with a passagelX into which th'etreanis end ofthe tube G 'extendsrf 1 The passage 1- may, as indicated, 'increasel progressively cross sectional @area inthe "direction 'of; ithe rear'iendor roof Y" of .the passages-Xl i asili' sure an abundant "supply ofifclegnsingefluidwill to the tube. Such cleansing fluid is con- Veyed to the passage X by a passage or passages Z in the plug VT and Which passages open at their outer` ends into an annular groove b in the outer surface of the plug` T. g

The ,cleansing fluid may be supplied to the groove b in any suitable and convenient manner, as for instance by a passage c in the back head E and which communicates at one end With the groove I) and With its other end With a connection Z leading from a suitable source of supply.

In order to prevent the leakage of Water from the recess R into the aperture P, and consequently into the cylinder B, a packing member e is disposed in the recess R to encircle the tube O and seat upon the bottom of the recess R. The packing member e is preferably of smaller diameter than the recess and is disposed Withinv a cup-like receptacle f through Which the tube O also extends. On the receptacle f is a rear bevelled surface g to seat against a correspondingly bevelled surface h on the front end of the plug T for retaining the receptacle in lcoaxial alignment with the plug and to prevent tiltingof the one with respect to the other. On the same end of the receptacle f and preferably adjacent the inner bounding edge of the bevelled surface g is an annular flange j which extends into a coniform annular recess lo in the' front or inner end of the plug T and encircling the passage X.

The annular recess 7c diverges from the front or open end thereof so that when the flange 7' lies therein the receptacle f will be suitably secured to the plug T by the outer surface of the flange j which engages the outer walls of the groove is. The groove lo and the flange j are, however, so proportioned that when these elements are in engagement with each otherfthe plug T and the receptacle f are capable of freely rotating-With respect to each other.

By means of the foregoing described con struction leakage of Water from the recess R into the cylinder B Will be entirely eliminated. The. packing member e Will not be unduly distorted'and for that reason Will remain fit for long periods of use. By connectingthe plug T and the receptacle f in the manner described these elements, as Well as the packing member e, may be convenient- 'ly removed from the krecess R as a unit to afford access to the tube O.

vThe manner in which the. receptacle f and the plug T-may be connected together is-asfolloivsz The receptacle f, as illustrated in Figure a, is originally constructed With a cylindrical flange y'. In securing the receptacle and the plug together the outer end ofthe fiange is seated in the open end of the groove 7c. A blow, as by. means of a hammer, mayV then bedelivered to thel receptacle which, of course, consists of suitable malleable material. Upon the application of a blow to the receptacle f the inner surface of the flange j will contact With the inner end of the Wall ,7c and the flange j will thus be distorted, that is, the flange j becomes flared in the direction of its outer or free end to conform to the angularity of the groove 7c. ln this manner the receptacle Will be permanently attached to the plug T and in such Wise that the receptacle is capable of free rotation with respect to the plug T. This is desirable for the reason that in threading the plug T into the recess R or unthreading it therefrom the receptacle f may remain stationary in the bottom of the recess R and the packing member e Will be protected against chafing or undue Wear such as might otherwise occur thereto Were a metallic element Vor elements of harder substance rotated thereon.

I claim:

In a rock drill, the combination cfa cylinder and a back head therefor having a recess, a tube in the cylinderand the back head and extending into the recess, a plug in the recess having a passage to receive the end of the tube and for conveying cleansing fiuid to the tube, said plug having an annular groove therein, a bevelled surface on the plug, a packing member encircling the tube and seating against the end Wall of the recess to prevent leakage of Water into the cylinder, a receptacle to receive the packing member and to yretain the packing member in sealing relation With the tube, a flange on the receptacle extending into the groove and being in engagement with the Wall thereof for'securing the receptacle to the plug, and a bevelled surface on the receptacle seating against the first mentioned bevelled surface to retain the receptacle in coaxial alignment with the. plug.

Tn testimony whereof I have signed this specification. 

